16 results about "Photoelectrolysis" patented technology

The application provides a surface fluorine-modified bismuth vanadate photoelectrode and a preparation method and application thereof. Fluorine atoms are attached to the surface of the bismuth vanadate, and part of the fluorine atoms replace the two-coordinated oxygen atoms on the surface of the bismuth vanadate, namely the surface fluorine-modified bismuth vanadate photoelectrode. The surface fluorine-modified bismuth vanadate photoelectrode greatly improves the oxidation rate and molecular reaction efficiency of hydroxyl radicals generated by photoelectrolysis of water, effectively improves the glycerol oxidation efficiency, the selectivity of the product formic acid, and reduces the energy consumption of the reaction.

The application belongs to the technical field of photoelectrolysis of water materials, and relates to a CoSnO3 / BiVO4 photoelectric anode, a preparation method and application of the CoSnO3 / BiVO4 photoelectric anode in preparation of hydrogen peroxide, which comprises the following steps: 1, cleaning a conductive substrate; 2, preparing CoSn(OH)6 powder by a coprecipitation method after adding solution A into Co and Sn sources and then hydrothermal preparation; 3, dissolving Bi sources in a solvent B to prepare a Bi precursor solution, and introducing the Bi sources on the conductive substrate by an electrodeposition method; 4, dissolving V sources in a solvent C, introducing the V sources on the conductive substrate by using a spin coating device, and heating and calcining in a high-temperature heating device to prepare a photoelectric anode BiVO4 layer; 5, introducing CoSn(OH)6 on the conductive substrate by a spin coating method, and finally obtaining a CoSnO3 / BiVO4 photoelectric catalytic electrode by heating and calcining in a high-temperature heating device. The photoelectric catalyst prepared by the application can effectively improve the photocurrent of the original BiVO4 itself, and can have high selectivity and high yield in the reaction of preparing hydrogen peroxide by two-electron water oxidation, so that the cost of preparing hydrogen peroxide by photoelectric catalysis can be effectively reduced.

The application relates to the technical field of purification or refining of silicon compounds, in particular to a high-purity quartz sand alkali metal targeted deep removal method, wherein quartz sand is mixed with silicon carbide abrasive and dry ground, and then is immersed into a solution containing ammonium fluoroborate, nano titanium dioxide and graphene quantum dots for etching; then a composite solution containing HEDP, EDTMPA, crown ether and beta-cyclodextrin is used to complex and leach alkali metals in a microwave field; then, through a photoelectric desorption reactor, the complex is decomposed under the cooperation of ultraviolet light and an electric field; then, a supergravity rotating bed is used for three-stage countercurrent washing; finally, a radio frequency plasma treatment is used to repair the crystal lattice and remove hydroxyl groups in a hydrogen atmosphere at high temperature; through multi-step cooperation, the alkali metals are deeply removed. Through surface modification, composite complexing, photoelectric desorption and other technologies, the total alkali metal content of the quartz sand is reduced, energy consumption is reduced, waste liquid is reduced, the purity and performance of the material are improved, and the application is suitable for high-end fields such as semiconductors.

The invention belongs to the technical field of hydrogen production catalysts, and particularly relates to a photosensitive semiconductor photoelectric hydrolysis hydrogen production photoelectrode loaded with a specific catalyst and a preparation method of the photoelectrode. The cheap transition metal sulfide catalyst is constructed on the surface of the photosensitive semiconductor photoelectrode, so that the catalytic activity and the carrier separation efficiency of a photoelectrode interface are effectively improved, and the photoelectrochemical hydrogen production performance comparable with that of a noble metal catalyst is realized. The metal sulfide is stably combined with a photosensitive material, so that the system is endowed with excellent electrochemical stability, and the solar energy-to-hydrogen energy conversion efficiency is relatively high under an illumination condition. Besides, the preparation process is simple and convenient, the operation condition is mild, the raw material source is wide, the cost is low, good expandability and potential large-scale industrial application prospects are achieved, and a feasible technical scheme is provided for promoting large-scale preparation of clean hydrogen energy.

The invention relates to a surface treatment method of an ultralow-profile electrolytic copper foil suitable for high-frequency and high-speed signal transmission. The surface treatment method comprises the following steps: (1) providing a double-sided photoelectrolytic copper foil as a base material; (2) carrying out acid pickling treatment on the base material so as to remove surface oxides and activate the base material; (3) a copper alloy layer is electrically deposited on the surface of the base material subjected to acid pickling treatment; (4) performing electrochemical dealloying treatment on the copper alloy layer; (5) electrically depositing an anti-oxidation layer on the dealloyed base material; and (6) coating the substrate deposited with the anti-oxidation layer with a silane coupling agent. According to the preparation method, the traditional thought of constructing copper nodules is abandoned, the uniform copper alloy layer is deposited on the base material, then non-copper components in the copper alloy layer are selectively removed, and a nano-scale porous structure is left, so that an extremely low profile is obtained, and meanwhile, an enough specific surface area is kept to ensure excellent binding force with resin.

The application belongs to the technical field of photoelectrocatalytic materials, and particularly relates to an experimental method for rapidly preparing copper oxide nanowires and application thereof. The preparation method is as follows: using a copper mesh as a substrate, Cu(OH)2 nanowire arrays are rapidly prepared on the surface of the copper mesh through a constant-voltage anodization method, and CuO nanowire arrays are prepared in situ through rapid dehydration of the Cu(OH)2 through high-temperature heat treatment x Compared with the existing P-type semiconductor materials, the material has a wide visible light absorption range as a photoelectrocatalytic material, has good performance in the fields of photoelectrolysis of water to produce hydrogen and light-assisted Li-CO2 batteries, solves the problem of low light energy utilization, and is beneficial to separation of photo-generated electron-hole pairs, so that the copper oxide nanowire material can be used as a positive electrode material of the Li-CO2 battery to measure a charge-discharge voltage close to a theoretical value.

The present invention discloses a wind-photovoltaic electrolysis hydrogen production system based on the Internet of Things, which relates to the technical field of green hydrogen production. The present invention comprises a wind power generation module, which includes a wind turbine generator set and a wind power rectifier module. The wind turbine generator set utilizes wind power to generate electricity, and the generated alternating current is converted into direct current through the wind power rectifier module; a solar power generation module utilizes solar photovoltaic panels to collect solar energy and convert it into electrical energy, which together with wind power generation supplies power for the hydrogen production process; an Internet of Things module: which at least includes sensors, data acquisition and transmission equipment, and a cloud data control center, wherein the sensors are used to monitor wind power, solar power generation conditions and various parameters in the electrolysis hydrogen production process in real time; an electrolysis hydrogen production module: which utilizes direct current generated by wind power or solar power generation to electrolyze water to generate hydrogen and oxygen; and a battery module: which utilizes the wind power generation module and the solar power generation module to store electrical energy, and provides auxiliary power for the electrolysis hydrogen production module.

This invention provides a method for the resource-based treatment of tailings wastewater and the simultaneous recovery of valuable metals, belonging to the field of mine wastewater treatment technology. The method includes: constructing a reaction system, which comprises a transparent reactor with a built-in working electrode, a power-free photovoltaic cell circuit system, a powered photoelectric electrolysis circuit system, and a light source; the photovoltaic cell circuit system and the photoelectric electrolysis circuit system are switched in parallel; the tailings wastewater is introduced into the transparent reactor and sealed; the light source is turned on, and only the photovoltaic cell circuit system is activated, to oxidize ammonia nitrogen into nitrogen gas and nitrate nitrogen, and recover some manganese metal; the light source is turned on, and only the photoelectric electrolysis circuit system is activated, to reduce manganese ions to recover manganese metal and reduce nitrate nitrogen into nitrogen gas. This invention provides a clean and efficient method for simultaneously oxidizing ammonia nitrogen in mine tailings wastewater and recovering valuable metals from the tailings wastewater; it utilizes an interconvertible photovoltaic cell reaction system and a photoelectric electrolysis reaction system to efficiently degrade ammonia-containing pollutants in tailings wastewater and recover manganese metal.

The utility model discloses a kind of floating solar photolysis water oxygenation hydrogen production devices, the device is provided with water storage pool and pure water tank, pure water tank is obtained by water evaporation in water storage pool, and water is supplied to photoelectrolytic cell by inlet pipe, solar cell assembly is arranged in the frame of photoelectrolytic cell, for converting solar light into electric energy, maintaining the required bias voltage of photoelectrolytic water;Its inside is provided with photoelectrochemical water decomposition component, for the energy electrolytic water hydrogen production in ultraviolet in solar spectrum and visible spectrum, photoelectrochemical water decomposition component includes anode catalyst layer, glass layer, light absorption layer and cathode catalyst layer, anode catalyst layer uses self-bias photo catalyst electrode, oxygen is generated under catalytic action and hydrogen is produced at cathode, infrared spectrum not absorbed by light anode is further converted into bias voltage by light absorption layer and maintained photolysis water hydrogen production.

The invention belongs to the field of photoelectrocatalysis, and discloses a method for synthesizing 2, 5-furandicarboxylic acid and hydrogen through synergistic photoelectrolysis of sulfite and cadmium sulfide / titanium dioxide (CdS / TiO2). According to the method, sulfite is introduced as an anode sacrificial agent and an optical / electric active substance, and cooperates with the photocatalyst CdS / TiO2 to promote photoelectrolysis of 5-hydroxymethylfurfural to synthesize high-added-value 2, 5-furandicarboxylic acid and green hydrogen, so that the method is beneficial to solving the problems of instability of the photocatalyst and high energy consumption of hydrogen production by electrolysis of water, and the method is suitable for industrial production of high-value-added 2, 5-furandicarboxylic acid and green hydrogen. And the synthesis reaction is carried out under a mild condition close to neutral, the use of strong base and high-temperature and high-pressure oxygen is avoided, the photoelectric energy utilization rate is high, the reaction is controllable, the operation is simple, the cost is low, and the potential application prospect is achieved.

The invention discloses a typical scene generation-based double-layer configuration optimization method for a wind-solar electrolytic hydrogen production system, and the method comprises the steps: carrying out the configuration searching optimization of an outer layer through employing a particle swarm optimization algorithm, and carrying out the energy management of an inner layer through employing a scene generation-based dynamic planning method; during inner-layer energy management, data of a combined typical scene is used as alternative input of original one-year environment data, the overall optimization target is to minimize the unit hydrogen production cost, and constraint conditions comprise a total hydrogen production capacity constraint, a component number constraint and a power constraint; according to the algorithm framework, an inner layer carries out optimal power distribution decision making according to a fixed configuration scheme, a corresponding objective function value is fed back to an outer layer, and the outer layer searches an optimal decision variable combination in a constraint interval by adopting a PSO algorithm. According to the method, good balance between optimization performance and calculation efficiency can be obviously achieved, and important theoretical reference and technical support are provided for system construction and capacity configuration optimization in related fields.

Methods, systems, and apparatus for photoelectrolytic disruption of PFAS, comprising a photoreactor vessel configured to receive an aqueous solution comprising PFAS, a UV light source configured to direct UV light onto the aqueous solution in the photoreactor vessel, a cathode within the photoreactor vessel configured to contact the aqueous solution within the photoreactor vessel, and an anode within the photoreactor vessel configured to contact the aqueous solution within the photoreactor vessel. An anode in an electrolyte solution, a power source configured to provide a voltage difference between the anode and the cathode, and a membrane or an ion bridge between the anode and the cathode. The cathode may be a mesh and may have a high surface area structure having an electrochemically active surface area greater than a geometric surface area.

The application belongs to the technical field of photoelectrolysis water material preparation, and relates to a method for preparing a non-metal element doped fullerene composite bismuth vanadate photoelectrolysis water, which comprises the following steps: s1, cleaning a conductive substrate; s2, performing non-metal element doping treatment on fullerene powder through a chemical vapor deposition method; s3, stirring modified fullerene after s2 treatment, a Bi source and a V source to prepare a catalyst slurry; s4, placing the conductive surface of the conductive substrate downward in the catalyst slurry, and performing hydrothermal in-situ growth to prepare a photoelectrocatalysis film; and s5, after natural cooling to room temperature, taking out the conductive substrate, and then heating and calcining to obtain a photoelectrolysis water electrode. The method is characterized in that the fullerene is doped with different metal elements through the chemical vapor deposition method, and then a uniform, dense and firm catalyst film is formed on the FTO through the hydrothermal in-situ growth method, and then a more stable and high-activity photoelectrolysis water electrode is obtained. The preparation method is simple, low in cost, and can realize large-scale electrode preparation.

The present invention provide a photoanode for a photoelectrolysis device, and a manufacturing method therefor. The photoanode for a photoelectrolysis device comprises: a polyimide (PI) layer; a laser-induced graphene (LIG) substrate formed by irradiating the PI layer with a laser; and a monoclinic tungsten oxide (m-WO3) nanostructure layer formed on the LIG substrate, wherein the PI layer is a flexible substrate and the photoanode is flexible.

The present invention discloses a wind-photovoltaic electrolysis hydrogen production system based on the Internet of Things, which relates to the technical field of green hydrogen production. The present invention comprises a wind power generation module, which includes a wind turbine generator set and a wind power rectifier module. The wind turbine generator set utilizes wind power to generate electricity, and the generated alternating current is converted into direct current through the wind power rectifier module; a solar power generation module utilizes solar photovoltaic panels to collect solar energy and convert it into electrical energy, which together with wind power generation supplies power for the hydrogen production process; an Internet of Things module: which at least includes sensors, data acquisition and transmission equipment, and a cloud data control center, wherein the sensors are used to monitor wind power, solar power generation conditions and various parameters in the electrolysis hydrogen production process in real time; an electrolysis hydrogen production module: which utilizes direct current generated by wind power or solar power generation to electrolyze water to generate hydrogen and oxygen; and a battery module: which utilizes the wind power generation module and the solar power generation module to store electrical energy, and provides auxiliary power for the electrolysis hydrogen production module.

The invention relates to the technical field of purification or refinement of silicon compounds, in particular to a high-purity quartz sand alkali metal targeted deep removal method, which comprises the following steps: mixing quartz sand and a silicon carbide grinding material, performing dry grinding, and immersing into a solution containing ammonium fluoroborate, nano titanium dioxide and graphene quantum dots for etching; then complexing and leaching the alkali metal in a microwave field by using a composite solution containing HEDP, EDTMPA, crown ether and beta-cyclodextrin; then decomposing the complex through a photoelectric desorption reactor under the cooperation of ultraviolet light and an electric field; carrying out three-stage countercurrent washing by using a supergravity rotating bed, treating and repairing crystal lattices by using radio frequency plasma, and carrying out high-temperature dehydroxylation in a hydrogen atmosphere; through multi-step cooperation, deep removal of alkali metal is realized. Through surface modification, composite complexing, photoelectric desorption and other technologies, the total alkali metal content of quartz sand is reduced, energy consumption is reduced, waste liquid is reduced, the material purity and performance are improved, and the method is suitable for the high-end field of semiconductors and the like.